MdePkg/Library/BaseMemoryLibSse2/x64/SetMem16.asm

   1 ;------------------------------------------------------------------------------
   2 ;
   3 ; Copyright (c) 2006, Intel Corporation
   4 ; All rights reserved. This program and the accompanying materials
   5 ; are licensed and made available under the terms and conditions of the BSD License
   6 ; which accompanies this distribution.  The full text of the license may be found at
   7 ; http://opensource.org/licenses/bsd-license.php
   8 ;
   9 ; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  10 ; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  11 ;
  12 ; Module Name:
  13 ;
  14 ;   SetMem16.asm
  15 ;
  16 ; Abstract:
  17 ;
  18 ;   SetMem16 function
  19 ;
  20 ; Notes:
  21 ;
  22 ;------------------------------------------------------------------------------
  23
  24     .code
  25
  26 ;------------------------------------------------------------------------------
  27 ;  VOID *
  28 ;  _mem_SetMem16 (
  29 ;    IN VOID   *Buffer,
  30 ;    IN UINTN  Count,
  31 ;    IN UINT16 Value
  32 ;    )
  33 ;------------------------------------------------------------------------------
  34 InternalMemSetMem16 PROC    USES    rdi
  35     mov     rdi, rcx
  36     mov     r9, rdi
  37     xor     rcx, rcx
  38     sub     rcx, rdi
  39     and     rcx, 15
  40     mov     rax, r8
  41     jz      @F
  42     shr     rcx, 1
  43     cmp     rcx, rdx
  44     cmova   rcx, rdx
  45     sub     rdx, rcx
  46     rep     stosw
  47 @@:
  48     mov     rcx, rdx
  49     and     edx, 7
  50     shr     rcx, 3
  51     jz      @SetWords
  52     movd    xmm0, eax
  53     pshuflw xmm0, xmm0, 0
  54     movlhps xmm0, xmm0
  55 @@:
  56     movntdq [rdi], xmm0
  57     add     rdi, 16
  58     loop    @B
  59     mfence
  60 @SetWords:
  61     mov     ecx, edx
  62     rep     stosw
  63     mov     rax, r9
  64     ret
  65 InternalMemSetMem16 ENDP
  66
  67     END